datapath/crc_t.c

   1 /*
   2  * Distributed under the terms of the GNU GPL version 2.
   3  * Copyright (c) 2007, 2008 The Board of Trustees of The Leland
   4  * Stanford Junior University
   5  */
   6
   7 #include <linux/string.h>
   8 #include <linux/kernel.h>
   9
  10 #include "crc32.h"
  11 #include "unit.h"
  12
  13
  14 static void
  15 print_error(unsigned int poly, char *data,
  16                         unsigned int expected, unsigned int calculated)
  17 {
  18         unit_fail("crc error: poly=%x data=%s expected=%x calculated=%x\n",
  19                                 poly, data, expected, calculated);
  20 }
  21
  22 void
  23 run_crc_t(void)
  24 {
  25         struct crc32 crc;
  26         unsigned int val, i, j;
  27
  28         char *data[3] = { "h3rei$@neX@mp13da7@sTr117G0fCH@r$",
  29                                 "1324lkqasdf0-[LKJD0;asd,.cv;/asd0:\"'~`co29",
  30                                 "6" };
  31
  32         unsigned int polys[2] = { 0x04C11DB7,
  33                                 0x1EDC6F41 };
  34
  35         unsigned int crc_values[2][3] = {
  36                                 { 0xDE1040C3, 0x65343A0B, 0xCEB42022 },
  37                                 { 0x6C149FAE, 0x470A6B73, 0x4D3AA134 } };
  38         for (i = 0; i < 2; i++) {
  39                 crc32_init(&crc, polys[i]);
  40                 for (j = 0; j < 3; j++) {
  41                         val = crc32_calculate(&crc, data[j], strlen(data[j]));
  42                         if (val != crc_values[i][j]) {
  43                                 print_error(polys[i], data[j], crc_values[i][j], val);
  44                         }
  45                 }
  46         }
  47 }